The anchor stress extent of a prestress anchor cable project has a direct relation with the project safety and performance. Prestressed tensioning method is a kind of nondestructive testing method, by which a reverse ...The anchor stress extent of a prestress anchor cable project has a direct relation with the project safety and performance. Prestressed tensioning method is a kind of nondestructive testing method, by which a reverse stretching load is applied on the external exposure section of anchor cable under construction or in service, and then the elongation variation of stress bars is measured to determine the anchor stress. We elaborated the theory and testing mechanism of prestressed tensioning method, and systematically studied key issues during the prestressed tensioning process of anchor cable by using physical model test, including the composition of tension stress-elongation curve, the variation of anchor stress, the compensation of locked anchor stress, and the judgment of anchor stress, and verified the theory feasibility of prestressed tensioning method. A case study on slope anchor cable of one highway project was conducted to further discuss on the test method, operation procedures and judgment of prestressed tensioning method on obtaining anchor stress, and then the test data of three situations were analyzed. The result provides a theoretical basis and technical base for the application of prestressed tensioning method to the evaluation of construction quality and operation conditions of anchor cable project.展开更多
本文以孟加拉国海域某悬链式单点系泊装置(Catenary Anchor Leg Mooring,CALM)装置为研究对象,研究了其在不同风浪流条件下的水动力响应和运动状态。采用理论研究与数值模拟的方法,研究单点系泊装置在有无油轮系泊工况下浮筒的运动响应...本文以孟加拉国海域某悬链式单点系泊装置(Catenary Anchor Leg Mooring,CALM)装置为研究对象,研究了其在不同风浪流条件下的水动力响应和运动状态。采用理论研究与数值模拟的方法,研究单点系泊装置在有无油轮系泊工况下浮筒的运动响应、锚链受力、水下软管响应及系泊缆受力等情况,进而开展了对比分析并从中总结锚链长度对单点系泊装置稳定性的影响及运动规律。最后通过仿真计算验证了该系统在系泊状态下的稳定性,给出了系泊关键参数和系统稳定性的关系。展开更多
基金Funded by the Science and Technolog Program of Ministry of Transport of P.R.China(No.2012318352100)
文摘The anchor stress extent of a prestress anchor cable project has a direct relation with the project safety and performance. Prestressed tensioning method is a kind of nondestructive testing method, by which a reverse stretching load is applied on the external exposure section of anchor cable under construction or in service, and then the elongation variation of stress bars is measured to determine the anchor stress. We elaborated the theory and testing mechanism of prestressed tensioning method, and systematically studied key issues during the prestressed tensioning process of anchor cable by using physical model test, including the composition of tension stress-elongation curve, the variation of anchor stress, the compensation of locked anchor stress, and the judgment of anchor stress, and verified the theory feasibility of prestressed tensioning method. A case study on slope anchor cable of one highway project was conducted to further discuss on the test method, operation procedures and judgment of prestressed tensioning method on obtaining anchor stress, and then the test data of three situations were analyzed. The result provides a theoretical basis and technical base for the application of prestressed tensioning method to the evaluation of construction quality and operation conditions of anchor cable project.
文摘本文以孟加拉国海域某悬链式单点系泊装置(Catenary Anchor Leg Mooring,CALM)装置为研究对象,研究了其在不同风浪流条件下的水动力响应和运动状态。采用理论研究与数值模拟的方法,研究单点系泊装置在有无油轮系泊工况下浮筒的运动响应、锚链受力、水下软管响应及系泊缆受力等情况,进而开展了对比分析并从中总结锚链长度对单点系泊装置稳定性的影响及运动规律。最后通过仿真计算验证了该系统在系泊状态下的稳定性,给出了系泊关键参数和系统稳定性的关系。
